Honestly HCG doesn't always return size to the testes, the leydig cells only make up 10% of the testicle, the chances of you noticing the difference are usually slim. People claim they swell up, how many times did you check the size of your balls before learning that HCG supposedly did this?
If you have ever been on testosterone for a long time without it you will notice that ejaculatory volume can decrease significantly. HCG will increase ejaculatory volume for some and sometimes benefit from increased sensitivity.
Many users claim it gives them a feeling of well being as well. Dr Chrisler proposes that it stimulates the P450 side-chain enzyme at the pituitary, in hopes to restore hormone balance in the metabolic pathways.
Some guys claim it is the best thing since sliced bread and they can't imagine how they ever lived without it. It has been one of the most misunderstood hormones yet.
So I guess your right you don't need it but I wouldn't say you don't want it, after all the actual amount of people that have negative effects with small doses of HCG are much smaller than those that have a positive effect